It includes governments from the Horn of Africa, Nile Valley and the African Great Lakes.

IGADD's headquarters were later moved to Djibouti, following an agreement signed in January 1986 by the member states.

[3] In April 1995, the Assembly of Heads of State and Government met in Addis Ababa, where they agreed to strengthen cooperation through the organization.

[3] IGAD have partner countries outside the Horn of Africa, Nile Valley and the African Great Lakes for participating at IGAD-RCP meetings on an ad hoc basis.

[11] On 21 February 2007, the United Nations Security Council approved Resolution 1744, which authorized the deployment of a new African Union Mission to Somalia (AMISOM) in place of IGASOM.